A pre-stage circuit of an AC-DC compatible on-board charger and on-board charger
A vehicle-mounted charger, compatible technology, applied in the direction of battery circuit devices, circuit devices, high-efficiency power electronic conversion, etc., can solve the problems of poor compatibility of vehicle-mounted chargers and high transformation costs, and achieve low transformation costs and small radiation and conduction interference , the effect of stable work
Active Publication Date: 2019-04-09
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the defects of poor compatibility and high modification cost of the vehicle-mounted charger in the prior art. According to one aspect of the present invention, a front-stage circuit of an AC-DC compatible vehicle-mounted charger is proposed
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Embodiment 1
[0047] In the first embodiment, the DC / DC boost circuit is specifically a BOOST boost circuit, and the BOOST boost circuit and the PFC circuit 40 work independently.
[0048] like Image 6 As shown, the rectifier circuit 10 adopts a full-wave rectifier circuit D2; the PFC circuit 40 includes: a first field effect transistor Q1, a first inductor L1, a first diode D3 and a first filter capacitor C1; wherein, the first field effect transistor The drain of Q1 is connected to the positive output end of the full-wave rectification circuit D2 (that is, the A terminal of the full-wave rectification circuit D2) through the first inductor L1, and the source is connected to the reverse output end of the full-wave rectification circuit D2 (that is, the full-wave rectification circuit D2 The terminal B of the rectifier circuit D2) is connected, and the drain of the first field effect transistor Q1 is also connected to the anode of the first diode D3, and the gate is connected to the first ...
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The invention discloses an AC / DC compatible vehicle-mounted charger pre-stage circuit and a vehicle-mounted charger. The pre-stage circuit consists of a rectifier circuit, an alternating-current voltage detection circuit, a direct-current voltage detecting circuit, a PFC circuit, a DC / DC boost circuit and a pulse width modulation integrated circuit. The input terminal of the rectifier circuit is connected with an external alternating-current input port; and the output terminal is respectively connected with the input terminal of the PFC circuit and the input terminal of the DC / DC boost circuit. An external direct-current input port is connected with the output terminal of the rectifier circuit; and the output terminal of the PFC circuit and the output terminal of the DC / DC boost circuit are connected with a post-stage power conversion circuit. A first PWM driving terminal of the pulse width modulation integrated circuit is connected with the PFC circuit; and a second PWM driving terminal of the pulse width modulation integrated circuit is connected with the DC / DC boost circuit. According to the technical scheme, compatibility of alternating-current and direct-current voltage inputs is realized; the improvement cost is low; the operation is stable; and the power grid interference and waveform distortion can be reduced.
Description
technical field [0001] The present invention relates to the technical field of charging, in particular to an AC-DC compatible vehicle-mounted charger front-stage circuit and the vehicle-mounted charger. Background technique [0002] Charging piles can be divided into AC charging piles and DC charging piles. The AC charging pile is a power supply device installed outside the electric vehicle and connected to the AC power grid to provide AC power for the on-board charger of the electric vehicle. It also has the function of metering and billing. AC charging piles generally only provide electric energy and do not provide vehicle status monitoring. The connection ports of AC charging piles are generally figure 1 As shown, among them, L is the AC power supply, N is the neutral line, PE is the ground terminal, NC1 is the empty terminal, NC2 is the empty terminal, CC is the charging connection confirmation terminal, and CP is the control confirmation terminal. The on-board charger...
Claims
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IPC IPC(8): H02J7/00H02J7/02H02M3/155H02M1/42
CPCY02B70/10
Inventor 王建殷树刚李涛郭增桥徐鲲鹏
Owner STATE GRID CORP OF CHINA